not necessarily my influences, but i consider them underrated:
1. brian setzer -- he can let rip rockabilly riffs and solos. i liken him to a modern-day chuck berry. great stage presence wit the big band and all.
2. prince -- as many have said, his questionable image simply overshadows his brilliance... not only with guitar, but the multiple instuments.
3. lenny kravitz -- because he can riff while singing, just like hetfield. and that the riff of "are you gonna go my way" is right up there with sweet child of mine in terms of recall
4. tuck andres -- because i am always awed by fingerstyle players who can do rhythm, melody, and bass simultaneously.
5. stanley jordan -- melodic tapping. hindi lang basta speed exercise.
6. whomever janet jackson's guitarist was on the song "black cat". great riff and solo
7. conan o'brien (yes the comedian) -- yes, he can play. he has live comedy acts that feature him singing and playing.